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断言错误:传入的类型不是 ComponentType,它没有 'ɵcmp' 属性

[英]ASSERTION ERROR: Type passed in is not ComponentType, it does not have 'ɵcmp' property

每当应用程序运行时我都会收到此错误,但不会导致我在当前开发中出现问题(我认为)我想了解此错误并知道它来自哪里,因为我完全迷路了,我什至无法发布相关信息代码。 但我会尝试..

所以这些是主要路线(appModule):

const routes: Routes = [
  {path:'home', component:HomeComponent, canActivate:[AuthGuardService]},
  {path:'detail/:id', component:DetailComponent},
  {path: 'register', component: RegisterComponent},
  {path:'login', component: LoginComponent},
  {path:'', redirectTo:'login', pathMatch: 'full'},
  {path:'**',  redirectTo:'login'}

];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

我有一个核心模块,所有组件都已注册,我正在导入RouterModule.forChild([])

@NgModule({
  declarations: [HomeComponent, DetailComponent, RegisterComponent, LoginComponent],
  imports: [
    CommonModule,
    FormsModule,
    ReactiveFormsModule,
    RouterModule.forChild([])
  ]
})
export class CoreModule { }

package.json:

{
  "name": "mat-shop",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "~9.1.9",
    "@angular/cdk": "^9.2.4",
    "@angular/common": "~9.1.9",
    "@angular/compiler": "~9.1.9",
    "@angular/core": "~9.1.9",
    "@angular/forms": "~9.1.9",
    "@angular/localize": "~9.1.9",
    "@angular/material": "^9.2.4",
    "@angular/platform-browser": "~9.1.9",
    "@angular/platform-browser-dynamic": "~9.1.9",
    "@angular/router": "~9.1.9",
    "@ng-bootstrap/ng-bootstrap": "^6.1.0",
    "bootstrap": "^4.4.0",
    "rxjs": "~6.5.4",
    "tslib": "^1.10.0",
    "zone.js": "~0.10.2"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.901.7",
    "@angular/cli": "~9.1.7",
    "@angular/compiler-cli": "~9.1.9",
    "@types/node": "^12.11.1",
    "@types/jasmine": "~3.5.0",
    "@types/jasminewd2": "~2.0.3",
    "codelyzer": "^5.1.2",
    "jasmine-core": "~3.5.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~5.0.0",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage-istanbul-reporter": "~2.1.0",
    "karma-jasmine": "~3.0.1",
    "karma-jasmine-html-reporter": "^1.4.2",
    "protractor": "~7.0.0",
    "ts-node": "~8.3.0",
    "tslint": "~6.1.0",
    "typescript": "~3.8.3"
  }
}

编辑应用模块

@NgModule({
  declarations: [
    AppComponent,
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
    BrowserAnimationsModule,
    CoreModule,
    NgbModule

  ],
  providers: [DataService, fakeBackendProvider, AuthService, AuthGuardService, ShoppingCartService ],
  bootstrap: [AppComponent, HttpClient]

我从未见过此错误。它是 Angular 9 问题吗? 难道我做错了什么?

此错误可能是由于两个常见错误

当您加载模块而不是组件时,反之亦然,则会出现此错误。

1.加载模块而不是组件,即

{
   path: 'login',
   component: LoginModule // mistake
}

2.加载组件而不是模块,即

{
   path: 'login',
   loadChildren: () => import('./login.module').then(m => m.LoginComponent) // mistake
}

您的应用程序模块的引导数组中有 HttpClient 。 这就是它给出这个错误的原因。

我有同样的错误,发生在我使用matDialog.open()需要一个组件而不是一个模块的方法时。

请务必导入您正在使用的组件

  1. .module 文件放入main.module.ts
import { YourModalModule } from './your-modal.module.ts'// <-- .module.ts
//...
@NgModule({
imports: [
  YourModalModule
]
})
  1. .component 文件放入main.component.ts
import { YourModalModule } from './your-modal.component.ts' // <-- .component.ts
//...
const confirmDialogRef = this._matDialog.open(YourModuleComponent, {})
// ...

编辑
在图书馆工作时也遇到了同样的错误。

导入的路径指向不正确的.umd

import { YourModuleComponent } from 'dist/website/bundles/my-lib.umd' // <-- mistake

const routes: Routes = [{ path: '', component: YourModuleComponent }]
import { YourModuleComponent } from './your-module.component' // <-- correct

const routes: Routes = [{ path: '', component: YourModuleComponent }]

当我不小心从页面的 Typescript 文件中的 @Component 装饰器中删除了 @ 字符时,我收到了这个错误。 例如:

@Component({
    selector: 'app-reset-password',
    templateUrl: './reset-password.page.html',
    styleUrls: ['./reset-password.page.scss'],
})
export class ResetPasswordPage {}

当您打开matDialog并传递除组件之外的任何其他类型时,您也会收到此错误。

我将指令而不是组件传递给dialog.open方法。

this.dialog.open(
  MyDirective, //Make sure this is component
  {...}
);

我只是遇到了同样的问题,但我的模块或组件文件及其导入没有任何问题。 我刚刚删除了 .angular 文件夹并再次运行 yarn run build 并且一切正常。

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